new in box with instructions. no need to buy a new cpu heatsink if you want to switch to AMD Ryzen CPU
2 each and i have 18 of those left. all for $30.
AMD AM4 Upgrade kit (RR-ACCY-AM4B-R1) Please youtube how to use; very straight forward installation.
Compatability:
* MasterAir Pro 4
* MasterAir Pro 3
* Hyper 412 Series
* Hyper 212 EVO
* Hyper 212 X